- Replaced Venus GPS 634FLPx (sparkfun #9133) with newer 638FLPx (sparkfun #11058). The unfortunate pinout reshuffling in the newer part makes version 2.2 of the tracker incompatible with the older part.
- Eagle 6.x is required
- Use Arduino's own 5V regulator
- Replaced TO220 3.3V regulator with SMT + board sink
- Added bleeder resistor for passive piezo speakers
- Support for active piezo buzzers
- Auto 3.3/5.0v operation for Chipkit Uno32 compatibility
- Battery voltage sensing
- This is a reduced version of the previous board, contributed by Kyle Crockett. As opposed to the stand-alone version, this a daughter board (shield) that plugs on Arduinos.
- MX146 support has been removed